?Cannot write to RAM for Flash Algorithms

This can have two reasons:

a) JTAG clock set to high. Use RTCK or 200KHz as JTAGclock for this device.

b) Project - Options - Utilities - ULINK Settings - RAMfor Algorithm incorrect. Should be Start: 0x40000000 Size: 0x800 for thisdevice.

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Mdk422 官方解决办法：

http://www.keil.com/support/docs/3561.htm

ULINK: Error: Cannot write to RAM forFlash Algorithms

Information in this knowledgebase article applies to:

§??????????????????MDK-ARM Version 4.22(a)

§??????????????????ULINK2 USB-JTAG Adapter

§??????????????????ULINKpro USB-JTAG Adapter

SYMPTOM

Flash download does not work with Texas Instruments(former Luminary) LM3Sxxx devices in MDK-ARM version 4.22(a) when reset-type"Autodetect" isselected in the ULINK2/pro driver setup dialog. The following error dialog isdisplayed:（改为下面最后一个即可）

Cannot Write to RAM for Flash Algorithms !

RESOLUTION

Please download the attached ZIP file and extract it intothe?C:KeilARMBIN?folder. If MDK-ARM is installed in adifferent folder,please adapt the path accordingly.

STATUS

This issue will be solved in MDK-ARM versions greater than4.22. The attached files only work for MDK-ARM version 4.22!

ATTACHED FILES

Request the?files attached?tothis knowledgebase article.

FORUM THREADS

The following?Discussion Forum?threads may provide informationrelated to this topic.

§??????????????????"CannotWrite to RAM for Flash Algorithms"

Last Reviewed:Wednesday,October 12,2011